package com.dnndo.web.controller.common;

import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.google.code.kaptcha.Producer;
import com.dnndo.common.config.RuoYiConfig;
import com.dnndo.common.constant.CacheConstants;
import com.dnndo.common.constant.Constants;
import com.dnndo.common.constant.RedisConstant;
import com.dnndo.common.core.domain.R;
import com.dnndo.common.core.domain.entity.SysUser;
import com.dnndo.common.core.redis.RedisCache;
import com.dnndo.common.exception.CustomExceptions;
import com.dnndo.common.utils.SmsUtil;
import com.dnndo.common.utils.StringUtils;
import com.dnndo.common.utils.sign.Base64;
import com.dnndo.common.utils.uuid.IdUtils;
import com.dnndo.system.domain.vo.CaptchaImageVO;
import com.dnndo.system.service.ISysConfigService;
import com.dnndo.system.service.ISysUserService;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiParam;
import jakarta.annotation.Resource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

/**
 * 验证码、短信 操作处理
 *
 * @author ruoyi
 */
@RestController
public class CaptchaController {
  @Resource(name = "captchaProducer")
  private Producer captchaProducer;

  @Resource(name = "captchaProducerMath")
  private Producer captchaProducerMath;

  @Autowired
  private RedisCache redisCache;

  @Autowired
  private ISysConfigService configService;

  @Autowired
  private SmsUtil smsUtil;

  @Autowired
  private ISysUserService userService;

  /**
   * 生成验证码
   */
  @GetMapping("/captchaImage")
  public R<CaptchaImageVO> getCode() {
    CaptchaImageVO vo = new CaptchaImageVO();
    boolean captchaEnabled = configService.selectCaptchaEnabled();
    vo.setCaptchaEnabled(captchaEnabled);
    if (!captchaEnabled) {
      return R.ok(vo);
    }

    // 保存验证码信息
    String uuid = IdUtils.simpleUUID();
    String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + uuid;
    String capStr = null, code = null;
    BufferedImage image = null;

    // 生成验证码
    String captchaType = RuoYiConfig.getCaptchaType();
    if ("math".equals(captchaType)) {
      String capText = captchaProducerMath.createText();
      capStr = capText.substring(0, capText.lastIndexOf("@"));
      code = capText.substring(capText.lastIndexOf("@") + 1);
      image = captchaProducerMath.createImage(capStr);
    } else if ("char".equals(captchaType)) {
      capStr = code = captchaProducer.createText();
      image = captchaProducer.createImage(capStr);
    }

    redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
    // 转换流信息写出
    FastByteArrayOutputStream os = new FastByteArrayOutputStream();
    try {
      ImageIO.write(image, "jpg", os);
    } catch (IOException e) {
      return R.fail("验证码生成失败，请稍后重试");
    }
    vo.setUuid(uuid);
    vo.setImg(Base64.encode(os.toByteArray()));
    // todo:（正式版本须应该删除）调试用输出
    System.out.println("code=" + code);
    return R.ok(vo);
  }

  /**
   * 校验图片验证码
   */
  @GetMapping("/validateCaptcha")
  public R<?> validateCaptchaCode(@ApiParam(value = "图片验证码", required = true) String captcha,
                                  @ApiParam(value = "唯一码", required = true) String uuid) {
    String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + StringUtils.nvl(uuid, "");
    System.out.println("validateCaptchaCode:verifyKey = " + verifyKey);
    String captchaRedis = redisCache.getCacheObject(verifyKey);
    if (captchaRedis == null) {
      return R.fail("验证码过期，请重新输入");
    }
    if (!captcha.equalsIgnoreCase(captchaRedis)) {
      return R.fail("验证码错误，请重新输入");
    }
    return R.ok();
  }

  /**
   * 发送短信验证码（图形验证码版）
   *
   * @param phone   手机号
   * @param uuid    唯一码
   * @param captcha 图片验证码验证码
   * @return AjaxResult
   */
  @GetMapping("/sendSms")
  public R<?> sendSms(@ApiParam(value = "手机号", required = true) String phone,
                      @ApiParam(value = "唯一码", required = true) String uuid,
                      @ApiParam(value = "图片验证码", required = true) String captcha) {
    //验证验证码
    validateCaptcha(captcha, uuid);
    return sendSms(phone);
  }

  /**
   * 发送短信验证码（直接发送版）
   *
   * @param phone 手机号
   * @return AjaxResult
   */
  @GetMapping("/sendSmsNoCaptcha")
  @ApiImplicitParam(name = "Authorization", value = "登录标识(token)", required = true, dataType = "String", paramType = "header")
  public R<?> sendSmsNoCaptcha(@ApiParam(value = "手机号", required = true) String phone) {
    //根据手机号查询是否已经有这个用户
    SysUser user = userService.getOne(new LambdaUpdateWrapper<SysUser>()
      .eq(SysUser::getPhonenumber, phone)
      .eq(SysUser::getDelFlag, 0));
    if (user != null) {
      return R.fail(201, "该手机号已注册");
    }
    return sendSms(phone);
  }

  /**
   * 发送注册验证码，判断是否已经注册
   */
  @GetMapping("/sendRegisterSms")
  public R<?> validateCaptcha(@ApiParam(value = "手机号", required = true) String phone,
                              @ApiParam(value = "唯一码", required = true) String uuid,
                              @ApiParam(value = "图片验证码", required = true) String captcha) {
    //验证验证码
    validateCaptcha(captcha, uuid);
    //根据手机号查询是否已经有这个用户
    SysUser user = userService.getOne(new LambdaUpdateWrapper<SysUser>()
      .eq(SysUser::getPhonenumber, phone)
      .eq(SysUser::getDelFlag, 0));
    if (user != null) {
      return R.fail(201, "该手机号已注册");
    }
    return sendSms(phone);
  }

  /**
   * 发送找回密码验证码，判断你是否有此用户
   */
  @GetMapping("/sendForgetPwdSms")
  public R<?> sendForgetPwdSms(@ApiParam(value = "手机号", required = true) String phone,
                               @ApiParam(value = "唯一码", required = true) String uuid,
                               @ApiParam(value = "图片验证码", required = true) String captcha) {
    //验证验证码
    validateCaptcha(captcha, uuid);
    //根据手机号查询是否已经有这个用户
    long count = userService.count(new LambdaUpdateWrapper<SysUser>()
      .eq(SysUser::getPhonenumber, phone)
      .eq(SysUser::getDelFlag, 0));
    if (count <= 0) {
      return R.fail(201, "该手机号未注册");
    }
    return sendSms(phone);
  }

  /**
   * 发送登录验证码，判断你是否有此用户
   */
  @GetMapping("/sendLoginSms")
  public R<?> sendLoginSms(@ApiParam(value = "手机号", required = true) String phone,
                           @ApiParam(value = "唯一码", required = true) String uuid,
                           @ApiParam(value = "图片验证码", required = true) String captcha) {
    //验证验证码
    validateCaptcha(captcha, uuid);
    //根据手机号查询是否已经有这个用户
    long count = userService.count(new LambdaUpdateWrapper<SysUser>()
      .eq(SysUser::getPhonenumber, phone)
      .eq(SysUser::getDelFlag, 0));
    if (count <= 0) {
      return R.fail(201, "该手机号未注册");
    }
    return sendSms(phone);
  }


  /**
   * 发送短信验证码
   *
   * @param phone 手机号
   * @return 结果
   */
  private R<?> sendSms(String phone) {
    //判断一分钟内是否已经发送验证码
    if (redisCache.hasKey(RedisConstant.SMS_CODE_COUNT_KEY + phone)) {
      return R.fail("发送过于频繁，请稍后重试");
    }
    String code = RandomUtil.randomNumbers(4);
    //写入Redis 有效期五分钟
    redisCache.setCacheObject(RedisConstant.SMS_CODE_KEY + phone, code, 5, TimeUnit.MINUTES);
    //写入次数到Redis
    redisCache.setCacheObject(RedisConstant.SMS_CODE_COUNT_KEY + phone, 1, 1, TimeUnit.MINUTES);
    smsUtil.sendSms(phone, code);
    return R.ok();
  }

  /**
   * 校验图片验证码
   *
   * @param code 验证码
   * @param uuid 唯一标识
   */
  public void validateCaptcha(String code, String uuid) {
    String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + StringUtils.nvl(uuid, "");
    String captcha = redisCache.getCacheObject(verifyKey);
    if (captcha == null) {
      throw new CustomExceptions("验证码过期，请重新输入");
    }
    redisCache.deleteObject(verifyKey);
    if (!code.equalsIgnoreCase(captcha)) {
      throw new CustomExceptions("验证码错误，请重新输入");
    }
  }
}
